98 lines
2.8 KiB
C#
98 lines
2.8 KiB
C#
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namespace YooAsset
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{
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internal abstract class UnityDownloadFileOperation : UnityWebRequestOperation
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{
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protected enum ESteps
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{
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None,
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CreateRequest,
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Download,
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CopyLocalFile,
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VerifyFile,
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Done,
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}
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protected readonly DefaultCacheFileSystem _fileSystem;
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protected readonly PackageBundle _bundle;
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protected readonly string _tempFilePath;
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private bool _watchDogInit = false;
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private bool _watchDogAborted = false;
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private ulong _lastDownloadBytes;
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private double _lastGetDataTime;
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/// <summary>
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/// 引用计数
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/// </summary>
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public int RefCount { private set; get; }
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internal UnityDownloadFileOperation(DefaultCacheFileSystem fileSystem, PackageBundle bundle, string url) : base(url)
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{
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_fileSystem = fileSystem;
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_bundle = bundle;
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_tempFilePath = _fileSystem.GetTempFilePath(bundle);
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}
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internal override string InternalGetDesc()
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{
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return $"RefCount : {RefCount}";
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}
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/// <summary>
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/// 更新看门狗监测
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/// 说明：监控时间范围内，如果没有接收到任何下载数据，那么直接终止任务！
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/// </summary>
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protected void UpdateWatchDog()
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{
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if (_fileSystem.DownloadWatchDogTime == int.MaxValue)
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return;
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if (_watchDogAborted)
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return;
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#if UNITY_2020_3_OR_NEWER
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double realtimeSinceStartup = UnityEngine.Time.realtimeSinceStartupAsDouble;
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#else
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double realtimeSinceStartup = UnityEngine.Time.realtimeSinceStartup;
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#endif
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if (_watchDogInit == false)
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{
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_watchDogInit = true;
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_lastDownloadBytes = 0;
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_lastGetDataTime = realtimeSinceStartup;
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}
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if (_webRequest.downloadedBytes != _lastDownloadBytes)
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{
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_lastDownloadBytes = _webRequest.downloadedBytes;
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_lastGetDataTime = realtimeSinceStartup;
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}
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else
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{
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double deltaTime = realtimeSinceStartup - _lastGetDataTime;
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if (deltaTime > _fileSystem.DownloadWatchDogTime)
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{
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_watchDogAborted = true;
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InternalAbort(); //终止网络请求
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}
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}
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}
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/// <summary>
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/// 减少引用计数
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/// </summary>
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public void Release()
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{
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RefCount--;
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}
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/// <summary>
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/// 增加引用计数
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/// </summary>
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public void Reference()
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{
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RefCount++;
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}
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}
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} |